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Abstract：
Silicon nitride (Si3N4) is a bioceramic material with potential applications. Customization and high reliability are the foundation for the widespread application of Si3N4 bioceramics. This study constructed a new microwave heating structure and successfully prepared 3D printed dense Si3N4 materials, overcoming the adverse effects of a large amount of 3D printed organic forming agents on degreasing and sintering processes, further improving the comprehensive performance of Si3N4 materials. Compared with control materials, the 3D printed Si3N4 materials by microwave sintering have the best mechanical performance: bending strength is 928 MPa, fracture toughness is 9.61 MPa·m1/2. Meanwhile, it has the best biocompatibility and antibacterial properties, and cells exhibit the best activity on the material surface. Research has shown that the excellent mechanical performance and biological activity of materials are mainly related to the high-quality degreasing, high cleanliness sintering environment, and high-quality liquid-phase sintering of materials in microwave environments.
摘要：
氮化硅(Si3N4)是一种具有潜在应用的生物陶瓷材料。定制化和高可靠性是Si3N4生物陶瓷广泛应用的基础。本研究构建了一种新的微波加热结构，并成功制备了3D打印致密Si3N4材料，克服了大量3D打印有机成型剂对脱脂和烧结过程的不利影响，进一步提高Si3N4材料的综合性能。与对照材料相比，微波烧结的3D打印Si3N4材料具有最佳的机械性能：弯曲强度为928MPa，断裂韧性为9.61MPa·m1/2。同时,它具有最佳的生物相容性和抗菌性能，和细胞在材料表面表现出最好的活性。研究表明,材料优异的机械性能和生物活性主要与优质的脱脂,高洁净度烧结环境，以及微波环境下材料的高质量液相烧结。
